<template>
    <div>
        <!-- 面包屑区域 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>数据统计</el-breadcrumb-item>
            <el-breadcrumb-item>数据报表</el-breadcrumb-item>
        </el-breadcrumb>

        <!-- 卡片视图区域 -->
        <el-card>
                <!-- 2、为ECharts准备一个具备大小（宽高）的Dom -->
                 <div id="main" style="width: 750px;height:400px;"></div>
        </el-card>
    </div>
</template>


<script>
// 1、导入 echarts
import *as echarts from 'echarts';
import _ from 'lodash'
export default {
    
    data() {
        return{
            //需要合并的数据
             options: {
          title: {
            text: '用户来源'
          },
          tooltip: {
            trigger: 'axis',
            axisPointer: {
              type: 'cross',
              label: {
                backgroundColor: '#E9EEF3'
              }
            }
          },
          grid: {
            left: '3%',
            right: '4%',
            bottom: '3%',
            containLabel: true
          },
          xAxis: [
            {
              boundaryGap: false
            }
          ],
          yAxis: [
            {
              type: 'value'
            }
          ]
        }
        }
    },
    created(){

    },
    //此时，页面上的元素，已经被渲染完毕了！
   async mounted(){
        //3、基于准备好的dom，初始化echarts实例
        var myChart = echarts.init(document.getElementById('main'));

        const {data:res} =await this.$http.get('reports/type/1')
        if(res.meta.status!==200){
            return this.$message.error('获取折线图数据失败！')
        }

        //4、准备数据和配置项
       const result= _.merge(res.data,this.options)

      //5、展示数据
      myChart.setOption(result);
    },
    methods:{
    }
}
</script>

<style scoped>

</style>